September weather forecast
Baucau, East Timor

As September sets in, the prolonged dry period gradually starts transitioning to the wet season once again. Baucau's weather in September, however, is typified by sun-drenched days marked by increased sunshine hours. The UV index is consistently high and requires careful safeguarding against excessive sun exposure. Sea temperatures return to their annual high, providing excellent conditions for water-based activities. Despite this returning trend towards the tropical monsoon climate, September remains essentially dry.

Temperature

September's beginning signals an average high-temperature of a still moderately hot 29.4°C (84.9°F), barely different from August's 28.2°C (82.8°F). In the month of September, the average temperature dips to a comfortable 18.5°C (65.3°F) during the night.

Heat index

Throughout September, the heat index is computed to be a tropical 31°C (87.8°F). With extended exposure and activity, one might feel exhausted and experience heat cramps.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.

Humidity

September is the least humid month, with an average relative humidity of 55%.

Rainfall

September is the month with the least rainfall, with 5mm (0.2") of accumulated precipitation.

Sea temperature

July through September, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater.
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

In Baucau, the average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 06:35 and sunset at 18:32. On the last day of September, sunrise is at 06:18 and sunset at 18:29 +09.

Sunshine

In Baucau, the average sunshine in September is 10h.

UV index

January through April, August through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 12 during September translates into these guidelines:
Take all necessary precautions, as unprotected skin can burn in minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Broad-spectrum SPF 30+ sunscreen must be generously applied and reapplied every two hours or post any outdoor activity or swim. Be attentive! The UV exposure is heightened with reflections from sand and water.